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<h1 class="epydoc">Source Code for <a href="keyczar.readers-module.html">Module keyczar.readers</a></h1>
<pre class="py-src">
<a name="L1"></a><tt class="py-lineno"> 1</tt>  <tt class="py-line"><tt class="py-comment">#!/usr/bin/python2.4</tt> </tt>
<a name="L2"></a><tt class="py-lineno"> 2</tt>  <tt class="py-line"><tt class="py-comment"></tt><tt class="py-comment">#</tt> </tt>
<a name="L3"></a><tt class="py-lineno"> 3</tt>  <tt class="py-line"><tt class="py-comment"></tt><tt class="py-comment"># Copyright 2008 Google Inc.</tt> </tt>
<a name="L4"></a><tt class="py-lineno"> 4</tt>  <tt class="py-line"><tt class="py-comment"></tt><tt class="py-comment">#</tt> </tt>
<a name="L5"></a><tt class="py-lineno"> 5</tt>  <tt class="py-line"><tt class="py-comment"></tt><tt class="py-comment"># Licensed under the Apache License, Version 2.0 (the "License");</tt> </tt>
<a name="L6"></a><tt class="py-lineno"> 6</tt>  <tt class="py-line"><tt class="py-comment"></tt><tt class="py-comment"># you may not use this file except in compliance with the License.</tt> </tt>
<a name="L7"></a><tt class="py-lineno"> 7</tt>  <tt class="py-line"><tt class="py-comment"></tt><tt class="py-comment"># You may obtain a copy of the License at</tt> </tt>
<a name="L8"></a><tt class="py-lineno"> 8</tt>  <tt class="py-line"><tt class="py-comment"></tt><tt class="py-comment"># </tt> </tt>
<a name="L9"></a><tt class="py-lineno"> 9</tt>  <tt class="py-line"><tt class="py-comment"></tt><tt class="py-comment">#      http://www.apache.org/licenses/LICENSE-2.0</tt> </tt>
<a name="L10"></a><tt class="py-lineno">10</tt>  <tt class="py-line"><tt class="py-comment"></tt><tt class="py-comment"># </tt> </tt>
<a name="L11"></a><tt class="py-lineno">11</tt>  <tt class="py-line"><tt class="py-comment"></tt><tt class="py-comment"># Unless required by applicable law or agreed to in writing, software</tt> </tt>
<a name="L12"></a><tt class="py-lineno">12</tt>  <tt class="py-line"><tt class="py-comment"></tt><tt class="py-comment"># distributed under the License is distributed on an "AS IS" BASIS,</tt> </tt>
<a name="L13"></a><tt class="py-lineno">13</tt>  <tt class="py-line"><tt class="py-comment"></tt><tt class="py-comment"># WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</tt> </tt>
<a name="L14"></a><tt class="py-lineno">14</tt>  <tt class="py-line"><tt class="py-comment"></tt><tt class="py-comment"># See the License for the specific language governing permissions and</tt> </tt>
<a name="L15"></a><tt class="py-lineno">15</tt>  <tt class="py-line"><tt class="py-comment"></tt><tt class="py-comment"># limitations under the License.</tt> </tt>
<a name="L16"></a><tt class="py-lineno">16</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="L17"></a><tt class="py-lineno">17</tt>  <tt class="py-line"><tt class="py-docstring">"""</tt> </tt>
<a name="L18"></a><tt class="py-lineno">18</tt>  <tt class="py-line"><tt class="py-docstring">A Reader supports reading metadata and key info for key sets.</tt> </tt>
<a name="L19"></a><tt class="py-lineno">19</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L20"></a><tt class="py-lineno">20</tt>  <tt class="py-line"><tt class="py-docstring">@author: arkajit.dey@gmail.com (Arkajit Dey)</tt> </tt>
<a name="L21"></a><tt class="py-lineno">21</tt>  <tt class="py-line"><tt class="py-docstring">"""</tt> </tt>
<a name="L22"></a><tt class="py-lineno">22</tt>  <tt class="py-line"> </tt>
<a name="L23"></a><tt class="py-lineno">23</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt class="py-name">os</tt>                 </tt>
<a name="L24"></a><tt class="py-lineno">24</tt>  <tt class="py-line"> </tt>
<a name="L25"></a><tt class="py-lineno">25</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt id="link-0" class="py-name" targets="Module keyczar.util=keyczar.util-module.html"><a title="keyczar.util" class="py-name" href="#" onclick="return doclink('link-0', 'util', 'link-0');">util</a></tt> </tt>
<a name="L26"></a><tt class="py-lineno">26</tt>  <tt class="py-line"> </tt>
<a name="Reader"></a><div id="Reader-def"><a name="L27"></a><tt class="py-lineno">27</tt> <a class="py-toggle" href="#" id="Reader-toggle" onclick="return toggle('Reader');">-</a><tt class="py-line"><tt class="py-keyword">class</tt> <a class="py-def-name" href="keyczar.readers.Reader-class.html">Reader</a><tt class="py-op">(</tt><tt class="py-base-class">object</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="Reader-collapsed" style="display:none;" pad="++" indent="++++"></div><div id="Reader-expanded"><a name="L28"></a><tt class="py-lineno">28</tt>  <tt class="py-line">  <tt class="py-docstring">"""Interface providing supported methods (no implementation)."""</tt> </tt>
<a name="L29"></a><tt class="py-lineno">29</tt>  <tt class="py-line"> </tt>
<a name="Reader.GetMetadata"></a><div id="Reader.GetMetadata-def"><a name="L30"></a><tt class="py-lineno">30</tt> <a class="py-toggle" href="#" id="Reader.GetMetadata-toggle" onclick="return toggle('Reader.GetMetadata');">-</a><tt class="py-line">  <tt class="py-keyword">def</tt> <a class="py-def-name" href="keyczar.readers.Reader-class.html#GetMetadata">GetMetadata</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="Reader.GetMetadata-collapsed" style="display:none;" pad="++" indent="++++++"></div><div id="Reader.GetMetadata-expanded"><a name="L31"></a><tt class="py-lineno">31</tt>  <tt class="py-line">    <tt class="py-docstring">"""</tt> </tt>
<a name="L32"></a><tt class="py-lineno">32</tt>  <tt class="py-line"><tt class="py-docstring">    Return the KeyMetadata for the key set being read.</tt> </tt>
<a name="L33"></a><tt class="py-lineno">33</tt>  <tt class="py-line"><tt class="py-docstring">    </tt> </tt>
<a name="L34"></a><tt class="py-lineno">34</tt>  <tt class="py-line"><tt class="py-docstring">    @return: JSON string representation of KeyMetadata object</tt> </tt>
<a name="L35"></a><tt class="py-lineno">35</tt>  <tt class="py-line"><tt class="py-docstring">    @rtype: string</tt> </tt>
<a name="L36"></a><tt class="py-lineno">36</tt>  <tt class="py-line"><tt class="py-docstring">    </tt> </tt>
<a name="L37"></a><tt class="py-lineno">37</tt>  <tt class="py-line"><tt class="py-docstring">    @raise KeyczarError: if unable to read metadata (e.g. IOError) </tt> </tt>
<a name="L38"></a><tt class="py-lineno">38</tt>  <tt class="py-line"><tt class="py-docstring">    """</tt> </tt>
</div><a name="L39"></a><tt class="py-lineno">39</tt>  <tt class="py-line">   </tt>
<a name="Reader.GetKey"></a><div id="Reader.GetKey-def"><a name="L40"></a><tt class="py-lineno">40</tt> <a class="py-toggle" href="#" id="Reader.GetKey-toggle" onclick="return toggle('Reader.GetKey');">-</a><tt class="py-line">  <tt class="py-keyword">def</tt> <a class="py-def-name" href="keyczar.readers.Reader-class.html#GetKey">GetKey</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">version_number</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="Reader.GetKey-collapsed" style="display:none;" pad="++" indent="++++++"></div><div id="Reader.GetKey-expanded"><a name="L41"></a><tt class="py-lineno">41</tt>  <tt class="py-line">    <tt class="py-docstring">"""</tt> </tt>
<a name="L42"></a><tt class="py-lineno">42</tt>  <tt class="py-line"><tt class="py-docstring">    Return the key corresponding to the given version.</tt> </tt>
<a name="L43"></a><tt class="py-lineno">43</tt>  <tt class="py-line"><tt class="py-docstring">    </tt> </tt>
<a name="L44"></a><tt class="py-lineno">44</tt>  <tt class="py-line"><tt class="py-docstring">    @param version_number: the version number of the desired key</tt> </tt>
<a name="L45"></a><tt class="py-lineno">45</tt>  <tt class="py-line"><tt class="py-docstring">    @type version_number: integer</tt> </tt>
<a name="L46"></a><tt class="py-lineno">46</tt>  <tt class="py-line"><tt class="py-docstring">    </tt> </tt>
<a name="L47"></a><tt class="py-lineno">47</tt>  <tt class="py-line"><tt class="py-docstring">    @return: JSON string representation of a Key object</tt> </tt>
<a name="L48"></a><tt class="py-lineno">48</tt>  <tt class="py-line"><tt class="py-docstring">    @rtype: string</tt> </tt>
<a name="L49"></a><tt class="py-lineno">49</tt>  <tt class="py-line"><tt class="py-docstring">    </tt> </tt>
<a name="L50"></a><tt class="py-lineno">50</tt>  <tt class="py-line"><tt class="py-docstring">    @raise KeyczarError: if unable to read key info (e.g. IOError) </tt> </tt>
<a name="L51"></a><tt class="py-lineno">51</tt>  <tt class="py-line"><tt class="py-docstring">    """</tt> </tt>
</div></div><a name="L52"></a><tt class="py-lineno">52</tt>  <tt class="py-line"> </tt>
<a name="FileReader"></a><div id="FileReader-def"><a name="L53"></a><tt class="py-lineno">53</tt> <a class="py-toggle" href="#" id="FileReader-toggle" onclick="return toggle('FileReader');">-</a><tt class="py-line"><tt class="py-keyword">class</tt> <a class="py-def-name" href="keyczar.readers.FileReader-class.html">FileReader</a><tt class="py-op">(</tt><tt class="py-base-class">Reader</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="FileReader-collapsed" style="display:none;" pad="++" indent="++++"></div><div id="FileReader-expanded"><a name="L54"></a><tt class="py-lineno">54</tt>  <tt class="py-line">  <tt class="py-docstring">"""Reader that reads key data from files."""</tt> </tt>
<a name="L55"></a><tt class="py-lineno">55</tt>  <tt class="py-line">   </tt>
<a name="FileReader.__init__"></a><div id="FileReader.__init__-def"><a name="L56"></a><tt class="py-lineno">56</tt> <a class="py-toggle" href="#" id="FileReader.__init__-toggle" onclick="return toggle('FileReader.__init__');">-</a><tt class="py-line">  <tt class="py-keyword">def</tt> <a class="py-def-name" href="keyczar.readers.FileReader-class.html#__init__">__init__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">location</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="FileReader.__init__-collapsed" style="display:none;" pad="++" indent="++++++"></div><div id="FileReader.__init__-expanded"><a name="L57"></a><tt class="py-lineno">57</tt>  <tt class="py-line">    <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">_location</tt> <tt class="py-op">=</tt> <tt class="py-name">location</tt> </tt>
</div><a name="L58"></a><tt class="py-lineno">58</tt>  <tt class="py-line">     </tt>
<a name="FileReader.GetMetadata"></a><div id="FileReader.GetMetadata-def"><a name="L59"></a><tt class="py-lineno">59</tt> <a class="py-toggle" href="#" id="FileReader.GetMetadata-toggle" onclick="return toggle('FileReader.GetMetadata');">-</a><tt class="py-line">  <tt class="py-keyword">def</tt> <a class="py-def-name" href="keyczar.readers.FileReader-class.html#GetMetadata">GetMetadata</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="FileReader.GetMetadata-collapsed" style="display:none;" pad="++" indent="++++++"></div><div id="FileReader.GetMetadata-expanded"><a name="L60"></a><tt class="py-lineno">60</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt id="link-1" class="py-name"><a title="keyczar.util" class="py-name" href="#" onclick="return doclink('link-1', 'util', 'link-0');">util</a></tt><tt class="py-op">.</tt><tt id="link-2" class="py-name" targets="Function keyczar.util.ReadFile()=keyczar.util-module.html#ReadFile"><a title="keyczar.util.ReadFile" class="py-name" href="#" onclick="return doclink('link-2', 'ReadFile', 'link-2');">ReadFile</a></tt><tt class="py-op">(</tt><tt class="py-name">os</tt><tt class="py-op">.</tt><tt class="py-name">path</tt><tt class="py-op">.</tt><tt class="py-name">join</tt><tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">_location</tt><tt class="py-op">,</tt> <tt class="py-string">"meta"</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
</div><a name="L61"></a><tt class="py-lineno">61</tt>  <tt class="py-line"> </tt>
<a name="FileReader.GetKey"></a><div id="FileReader.GetKey-def"><a name="L62"></a><tt class="py-lineno">62</tt> <a class="py-toggle" href="#" id="FileReader.GetKey-toggle" onclick="return toggle('FileReader.GetKey');">-</a><tt class="py-line">  <tt class="py-keyword">def</tt> <a class="py-def-name" href="keyczar.readers.FileReader-class.html#GetKey">GetKey</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">version_number</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="FileReader.GetKey-collapsed" style="display:none;" pad="++" indent="++++++"></div><div id="FileReader.GetKey-expanded"><a name="L63"></a><tt class="py-lineno">63</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt id="link-3" class="py-name"><a title="keyczar.util" class="py-name" href="#" onclick="return doclink('link-3', 'util', 'link-0');">util</a></tt><tt class="py-op">.</tt><tt id="link-4" class="py-name"><a title="keyczar.util.ReadFile" class="py-name" href="#" onclick="return doclink('link-4', 'ReadFile', 'link-2');">ReadFile</a></tt><tt class="py-op">(</tt><tt class="py-name">os</tt><tt class="py-op">.</tt><tt class="py-name">path</tt><tt class="py-op">.</tt><tt class="py-name">join</tt><tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">_location</tt><tt class="py-op">,</tt> <tt class="py-name">str</tt><tt class="py-op">(</tt><tt class="py-name">version_number</tt><tt class="py-op">)</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
</div></div><a name="L64"></a><tt class="py-lineno">64</tt>  <tt class="py-line"> </tt>
<a name="EncryptedReader"></a><div id="EncryptedReader-def"><a name="L65"></a><tt class="py-lineno">65</tt> <a class="py-toggle" href="#" id="EncryptedReader-toggle" onclick="return toggle('EncryptedReader');">-</a><tt class="py-line"><tt class="py-keyword">class</tt> <a class="py-def-name" href="keyczar.readers.EncryptedReader-class.html">EncryptedReader</a><tt class="py-op">(</tt><tt class="py-base-class">Reader</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="EncryptedReader-collapsed" style="display:none;" pad="++" indent="++++"></div><div id="EncryptedReader-expanded"><a name="L66"></a><tt class="py-lineno">66</tt>  <tt class="py-line">  <tt class="py-docstring">"""Reader that reads encrypted key data from files."""</tt> </tt>
<a name="L67"></a><tt class="py-lineno">67</tt>  <tt class="py-line">   </tt>
<a name="EncryptedReader.__init__"></a><div id="EncryptedReader.__init__-def"><a name="L68"></a><tt class="py-lineno">68</tt> <a class="py-toggle" href="#" id="EncryptedReader.__init__-toggle" onclick="return toggle('EncryptedReader.__init__');">-</a><tt class="py-line">  <tt class="py-keyword">def</tt> <a class="py-def-name" href="keyczar.readers.EncryptedReader-class.html#__init__">__init__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">reader</tt><tt class="py-op">,</tt> <tt class="py-param">crypter</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="EncryptedReader.__init__-collapsed" style="display:none;" pad="++" indent="++++++"></div><div id="EncryptedReader.__init__-expanded"><a name="L69"></a><tt class="py-lineno">69</tt>  <tt class="py-line">    <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">_reader</tt> <tt class="py-op">=</tt> <tt class="py-name">reader</tt> </tt>
<a name="L70"></a><tt class="py-lineno">70</tt>  <tt class="py-line">    <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">_crypter</tt> <tt class="py-op">=</tt> <tt class="py-name">crypter</tt> </tt>
</div><a name="L71"></a><tt class="py-lineno">71</tt>  <tt class="py-line">   </tt>
<a name="EncryptedReader.GetMetadata"></a><div id="EncryptedReader.GetMetadata-def"><a name="L72"></a><tt class="py-lineno">72</tt> <a class="py-toggle" href="#" id="EncryptedReader.GetMetadata-toggle" onclick="return toggle('EncryptedReader.GetMetadata');">-</a><tt class="py-line">  <tt class="py-keyword">def</tt> <a class="py-def-name" href="keyczar.readers.EncryptedReader-class.html#GetMetadata">GetMetadata</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="EncryptedReader.GetMetadata-collapsed" style="display:none;" pad="++" indent="++++++"></div><div id="EncryptedReader.GetMetadata-expanded"><a name="L73"></a><tt class="py-lineno">73</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">_reader</tt><tt class="py-op">.</tt><tt id="link-5" class="py-name" targets="Method keyczar.readers.EncryptedReader.GetMetadata()=keyczar.readers.EncryptedReader-class.html#GetMetadata,Method keyczar.readers.FileReader.GetMetadata()=keyczar.readers.FileReader-class.html#GetMetadata,Method keyczar.readers.Reader.GetMetadata()=keyczar.readers.Reader-class.html#GetMetadata"><a title="keyczar.readers.EncryptedReader.GetMetadata
keyczar.readers.FileReader.GetMetadata
keyczar.readers.Reader.GetMetadata" class="py-name" href="#" onclick="return doclink('link-5', 'GetMetadata', 'link-5');">GetMetadata</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
</div><a name="L74"></a><tt class="py-lineno">74</tt>  <tt class="py-line">   </tt>
<a name="EncryptedReader.GetKey"></a><div id="EncryptedReader.GetKey-def"><a name="L75"></a><tt class="py-lineno">75</tt> <a class="py-toggle" href="#" id="EncryptedReader.GetKey-toggle" onclick="return toggle('EncryptedReader.GetKey');">-</a><tt class="py-line">  <tt class="py-keyword">def</tt> <a class="py-def-name" href="keyczar.readers.EncryptedReader-class.html#GetKey">GetKey</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">version_number</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="EncryptedReader.GetKey-collapsed" style="display:none;" pad="++" indent="++++++"></div><div id="EncryptedReader.GetKey-expanded"><a name="L76"></a><tt class="py-lineno">76</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">_crypter</tt><tt class="py-op">.</tt><tt id="link-6" class="py-name" targets="Method keyczar.keyczar.Crypter.Decrypt()=keyczar.keyczar.Crypter-class.html#Decrypt,Method keyczar.keys.AesKey.Decrypt()=keyczar.keys.AesKey-class.html#Decrypt,Method keyczar.keys.RsaPrivateKey.Decrypt()=keyczar.keys.RsaPrivateKey-class.html#Decrypt"><a title="keyczar.keyczar.Crypter.Decrypt
keyczar.keys.AesKey.Decrypt
keyczar.keys.RsaPrivateKey.Decrypt" class="py-name" href="#" onclick="return doclink('link-6', 'Decrypt', 'link-6');">Decrypt</a></tt><tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">_reader</tt><tt class="py-op">.</tt><tt id="link-7" class="py-name" targets="Method keyczar.keyczar.Keyczar.GetKey()=keyczar.keyczar.Keyczar-class.html#GetKey,Method keyczar.readers.EncryptedReader.GetKey()=keyczar.readers.EncryptedReader-class.html#GetKey,Method keyczar.readers.FileReader.GetKey()=keyczar.readers.FileReader-class.html#GetKey,Method keyczar.readers.Reader.GetKey()=keyczar.readers.Reader-class.html#GetKey"><a title="keyczar.keyczar.Keyczar.GetKey
keyczar.readers.EncryptedReader.GetKey
keyczar.readers.FileReader.GetKey
keyczar.readers.Reader.GetKey" class="py-name" href="#" onclick="return doclink('link-7', 'GetKey', 'link-7');">GetKey</a></tt><tt class="py-op">(</tt><tt class="py-name">version_number</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
</div></div><a name="L77"></a><tt class="py-lineno">77</tt>  <tt class="py-line"> </tt><script type="text/javascript">
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